Hentai is based on the eponymous visual novel from the Studio "Azarashi Soft", released in 2017.

It was his last winter of student life and with the approach of final exams he was filled with sadness and melancholy. His life is not defined and his parents stopped sponsoring our hero Nozomu-kun. His childhood friend could not leave him in such a state and decided to shelter the hero under his roof for only one month. Nozomu in a short time ceased to see her as a childhood friend and began to admire her as a woman. Soon he's in love, but their relationship as joint cohabitation will end in exactly one month.

 

Added subtitles